Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

{110} surface exposed titanium dioxide photocatalysis material and preparation method thereof

A photocatalytic material, titanium dioxide technology, applied in the field of photocatalysis, achieves the effects of mild conditions, good repeatability, and short preparation cycle

Inactive Publication Date: 2013-02-27
EAST CHINA UNIV OF SCI & TECH
View PDF1 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, so far, there are few reports on the highest energy {110} facets of anatase single crystals.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • {110} surface exposed titanium dioxide photocatalysis material and preparation method thereof
  • {110} surface exposed titanium dioxide photocatalysis material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add secondary water, hydrogen peroxide and hydrofluoric acid into the polytetrafluoroethylene lining of the reaction kettle so that the concentrations of hydrogen peroxide and hydrofluoric acid are 2.4 mol / L and 0.1 mol / L, respectively. Then, add 1.2×10 -4 mol of titanium trichloride, stirred evenly, put the mixture in a high-pressure reactor, put it in an oven at 180°C, and react for 18 hours.

[0020] After the reaction kettle was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was centrifuged and washed 6 times with secondary water. After washing, the precipitate was dried in a 60° C. oven for 12 hours under vacuum to obtain an anatase titanium dioxide photocatalyst with exposed {110} faces.

[0021] The different angles scanning electron microscope picture of embodiment 1 gained product is as figure 1 As shown, it can be seen from the figure that the crystal surfaces of the obtained products can be divided into three ...

Embodiment 2

[0024] Add secondary water, hydrogen peroxide and hydrofluoric acid into the polytetrafluoroethylene lining of the reaction kettle so that the concentrations of hydrogen peroxide and hydrofluoric acid are 1.5 mol / L and 0.1 mol / L, respectively. Then, add 1.2×10 -4 mol of titanium trichloride, stirred evenly, put the mixture in a high-pressure reactor, put it in an oven at 180°C, and react for 18 hours.

[0025] After the reaction kettle was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was centrifuged and washed 6 times with secondary water. After washing, the precipitate was dried in a 60°C oven for 12 hours under vacuum to obtain a titanium dioxide photocatalyst with a large {110} surface exposed.

Embodiment 3

[0027] Add secondary water, hydrogen peroxide and hydrofluoric acid into the polytetrafluoroethylene lining of the reactor so that the concentrations of hydrogen peroxide and hydrofluoric acid are 0.9mol / L and 0.1mol / L, respectively. Then, add 1.2×10 -4 mol of titanium trichloride, stirred evenly, put the mixture in a high-pressure reactor, put it in an oven at 180°C, and react for 18 hours.

[0028] After the reaction kettle was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was centrifuged and washed 6 times with secondary water. After washing, the precipitate was put into an oven at 60° C. for 12 hours in vacuum to dry to obtain a titanium dioxide photocatalyst with exposed {110} faces.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a {110} high-energy surface exposed titanium dioxide photocatalysis material and a preparation method thereof. Exposed surfaces of the photocatalysis material comprise a {101} surface, a {001} surface and a {110} surface, and the proportion of the {110} surface is as high as 20%. The preparation method comprises the following steps: (1) in an aqueous solution system, adding a titanium source, enabling hydrogen peroxide and hydrofluoric acid to serve as a conditioning agent for crystal growth, performing a hydrothermal reaction for 3-36h at 120-220 DEG C, and obtaining {110} surface exposed anatase titanium dioxide single crystals; (2) removing foreign ions in the solution by washing centrifugation and high-temperature calcination; and (3) using a vacuum drying oven to dry samples, and obtaining titanium dioxide single crystal photocatalysis material powder. The {110} surface exposed titanium dioxide photocatalysis material and the preparation method have the advantages of simpleness in preparation process, mildness in conditions and convenience in aftertreatment and the like. A prepared photocatalyst has good photocatalytic degradation activity for organic pollutants (Rhodamine B) such as dyes.

Description

technical field [0001] The invention relates to a novel photocatalytic material with a special shape and a preparation method thereof, belonging to the technical field of photocatalysis. Background technique [0002] The rapid development of modern industry and science and technology, on the one hand, has greatly enriched people's material and cultural life and promoted the civilization and progress of human society. More and more pollutants containing benzene rings, heterocycles, halogenated compounds, NOx, SOx and other pollutants are discharged, which destroys the atmosphere, water sources and soil environment on which human beings depend, seriously affects the normal life and production of human beings, and even endangers of human existence. At present, government departments and research institutions in various countries have paid unprecedented attention to environmental pollution issues. Many countries have invested a lot of manpower and material resources in the rese...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J21/06C01G23/053C01G23/08
Inventor 田宝柱李套云李艺茹张金龙王婷婷杨钒陈星熊天庆
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com